Exhaust Information

Exhaust option

I found these Superior exhaust
extentions at Pep Boys. They will fit in the collector box if the
old mufflers are cut off at the welds. some trimming of the small
ends of the extentions will be needed to make it fit properly before the
pipe is welded on. Also, you can reuse your old hanger if you cut it
off the muffler and have it tack-welded to the new
pipe.

You will have to fabricate baffles to
fit the pipes. I think a simple way to do it would be to make end plates
that fit inside the tubes like the Mac baffles use. They look similar to
the plastic end caps used in mailing tubes. you would use one at
each end of the baffle and secure the inner one with a bolt thru the
bottom backside of the muffler and baffle "cap"

Hopefully you can see
from the above pic that creating the baffle is simply a matter of having a
tube welded to a resonator mounted to a round, fairly tight fitting steel
plate. the end caps would take a bit more fabrication to add a mounting
flange, poss welding on some 3 1/4 OD pipe. the inner pipes can then
be drilled with perforations, and even fiberglass or stainless steel wool
added to deaden sound, etc.

The pipes at Pep Boys were only
wrapped in celophane, not on a card.

Click pic to see full size
image

Above is the baffle design, it is a
straight pipe with a resinator at the end. this is a simple design
& inexpensive to build. the perf baffle is wraped in Stainless steel
wool rather than regular steel wool which would rust out pretty
quick. The SS wool will eventually need replacing, depending on how
fast it "soots" up. I got this design from "Monyt's Honda Tourer page, exhaust
mods" It is a
very interesting page on how he went through several steps to experiment
with different baffle setup. I decieded to start with what worked
best from him. The forward end of the inlet pipe should be capped off and
the forward end plate should be drilled extensivly to allow exhaust gasses
into the baffle.

Inner Baffle Pipe:
I'm using 10" x 1 1/2 I.D pipe and shortened
2" adapters for the resonator, (for a total length of 14") but
you can use whatever I. D. & length you prefer

I'll add more pics with the stainless steel wool wrap
and the muffler attached to the collector
box as I get there. Note: I never finished this project as I ended up
buying a Mac System & a SpecII system for the spare
Vision...